Percolator



(No Model.)

C. K. BRADFORD 8v J. G. BENEDIOT.

PERGOLATORi No. 299,198. Patented May 27, 1884.

|i lil Wzesses. wgf@ ZIN/eiwit rre artnr FFTQFW CHARLES KEMPTON BRADFORD, OF LYNNFIELD, AND JOHN GANO BENEDIOT, OF BOSTON, MASSACHUSETTS.

PERCOLATOR.

SPECIFICATION forming part oi' Letters Patent No. 299,198, dated May 27, 1884i.

Application lcd October 2&2, 1883. (No model.)

.To @ZZ whom t may concern.-

Be 1t known that we, CHARLES KEMr'roN BRADFORD and JOHN GANO BENEDICT, citizens of the United States, the first residing at Lynneld, in the county of Essex and State of Massachusetts, and the latter at Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Pharmacists Percolators, and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which forni a part of this specification.

This invention relates to drug-percolators, and it consists in the combination of the percolating-vessel with a detachable cover, an airforcing device attached to said cover, and devices for clamping the cover in place on said vessel 5 also, in the special construction of the clamping mechanism, as hereinafter set forth and claimed.

The drawings accompanying this specification represent, in Figure l, a sectional elevation, and in Fig. 2 a plan, of a percolator containing our improvements. Fig, 3 is a section through the cover and air-supply pipe. Fig. 4 is a modification of the invention.

In said drawings, Arepresents a glass urn such las is generally employed by pharmacists for the preparation of various chemical ormedicinal infusions. Percol ation is carried on in these vessels by placing a mass of tow or other material in the bottom over the outlet B to obstruct drug, the latter being placed upon the tow and the menstruum poured upon the drug, such menstruum slowly percolating through the drug by the pressure of the atmosphere.

O in the drawings representsa cover, of any suitable material, of asize to cover the mouth of the urn, a suitable rubber or other packing-ring, D, being preferably inserted between the two to hermetically seal the joint, though a ground joint may answer the purpose. To crowd the cover C tightly upon the urn, various devices may be used-as, for instance,

screw-thread upon the cover inclosing one upon the mouth of the urn; or a bar placed over the cover, with its ends hooked to engage a ledge upon the mouth of the urn, may be employed,with a screw passing through the bar and down upon the cover; or other well-known devices employed for sealing fruit-j ars may be used.

The device herein shown for closing the cover consists of several levers, E E, pivoted at about their centers to lugs upon the cover, the nose of each lever being pivoted to one end of a looped link, F, the opposite end of each link being adapted to embrace a spur, G, projecting laterally from an annular band, H, which encircles the upper edge of the urn. The tails of the levers are covered by a washer, I, loosely embracing a screw, J, erected upon the cover, such washer being in turn covered by a hand-nut, K, which screws upon' the screw J. Screwing down the nut K lowers the tails of the levers, and in so doing lowers the levers bodily, and with them the cover, and tightly closes the latter. A reverse movement of the nut slackens the levers and allows the cover to be removed.

a in the drawings represents a pipe connecting with an opening through the cover, such pipe being preferably provided with a cock, b. lVith this pipe a any suitable device for forcing air or other elastic fluid into the urn is connected. As shown herein, this device is an ordinary enema-syringe, c.

To enable the supply of menstruunr in the urn to be readily renewed without removing the cover, should occasion demand, the feedtube d of the syringe may be placed in the vessel containing such menstrunm and the syringe used as a pump to force the menstruum into the urn. IVhen the requisite quantity has thus been transferred, the feed-tube is removed and the syringe ready to perform its normal functions as an air-pump.

In lieu of the enema-syringe, an ordinary airpump may be employed, and the air-inlet, in lieu of being in the cover, may be in the upper part of the urn.

vWe prefer the syringe as being simple, inexpensive, and well adapted to the purpose,

a l and we prefer to admit the air through the IOO cover, in order that it may strike directly downward upon the contents of the urn.

We consider our invention to embrace,rst, a method of percolating which consists in applying pressure to the top of the menstruum to hasten the precipitation ofthe latter through the drug; and, secondarily, in the combination, with a pharmacists percolator, of means for forcing air or other elastic iiuid upon the contents of the urn, without restricting ourselves to any given details of mechanism for effecting this result.

To hasten the precipitation of the menstruum, we contemplate creating a vacuum in the jar, which receives the infusion as it leaves the percolator. To this end we form upon the upper part of the jar (which is shown in Fig.

' 4 of the accompanying drawings at a2) a tubular nipple, b2, and We adapt the mouth of the 2o jar to receive the neck of the urn Asufficiently tight to prevent entrance of air to the former. When a jar thus formed is used, air is rst forced into the urn A, and the cock b closed f to retain the pressure upon the menstruum.

We are aware that it is not new to force air into the interior of a percolating-vessel, nor to create a vacuum below the material to be acted on therein, for the purpose of expediting the passage of the menstruum through the said material. We therefore do not broadly claim such processes or methods.

1. Adrug-percolator consisting of vessel A, provided with detachable cover C, in combination with an air-forcing device attached to said cover, and clamping mechanism for holding said cover in place on said vessel, substantially as set forth.

2. In a drug-percolator, the combination, with the vessel and its cover, of the levers E, mounted on said cover, the screw-threaded rod and nut whereby the inner e/nds of said lef vers are acted on, and the links F, connecting the outer ends of said levers with said vessel,

substantially as set forth.

In testimony whereof we affix our signatures in presence of two Witnesses.

CHARLES KEMPTON BRADFORD. JOHN GANO BENEDIC'I.

Vitnesses:

Tnos. T. BAILEY, F. CURTIS. 

